yes you can do a uninstall and install so that you can resubmit your registration details.
Here is the article for uninstalling the Mac TurboTax product :
https://ttlc.intuit.com/community/installing/help/remove-uninstall-turbotax-for-mac/00/26050
Note: You might have to activate your product again using the license code provided along with downloading the updates if any are available
